EP2139291B1 - Verfahren zur Kommunikation über einen Halb-Duplex-Funkkanal in einem Funknetzwerk - Google Patents

Verfahren zur Kommunikation über einen Halb-Duplex-Funkkanal in einem Funknetzwerk Download PDF

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Publication number
EP2139291B1
EP2139291B1 EP08011715A EP08011715A EP2139291B1 EP 2139291 B1 EP2139291 B1 EP 2139291B1 EP 08011715 A EP08011715 A EP 08011715A EP 08011715 A EP08011715 A EP 08011715A EP 2139291 B1 EP2139291 B1 EP 2139291B1
Authority
EP
European Patent Office
Prior art keywords
subscriber
transmission
time
communication method
user message
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP08011715A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2139291A1 (de
Inventor
Dieter Hofmann
Peter Steinmill
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Priority to ES08011715T priority Critical patent/ES2371119T3/es
Priority to EP08011715A priority patent/EP2139291B1/de
Priority to AT08011715T priority patent/ATE519351T1/de
Priority to US13/001,464 priority patent/US20110211498A1/en
Priority to PCT/EP2009/057936 priority patent/WO2009156460A1/de
Publication of EP2139291A1 publication Critical patent/EP2139291A1/de
Application granted granted Critical
Publication of EP2139291B1 publication Critical patent/EP2139291B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/04—Scheduled access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H04W74/0816—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance

Definitions

  • the invention relates to a communication method for a radio network, with at least two participants, wherein a radio channel is indeed used in both directions between the participants, but always only one after the other in one direction and then in the other direction, that is not simultaneously in both directions and wherein the subscribers are each given transmission times in a time frame at which one subscriber may send a useful telegram to the other subscriber.
  • half-duplex methods are used.
  • telegrams are sent one after the other in one direction or the other.
  • the simultaneous use of such a radio link in both directions would lead to collisions and must therefore be avoided.
  • polling is followed by a cyclical polling.
  • a query is sent by a master to a slave of a communication network in one direction and the slave then responds by transmitting a present useful message in the other direction. In the absence of usage data, this can be communicated in the response telegram.
  • this half-duplex method correspondingly long times are reserved for the queries and response telegrams, which results in long response times for many queries.
  • the invention is based on the object to improve a method of the type mentioned above so that the shortest possible reaction times can be achieved.
  • the object is achieved by a method having the features of claim 1.
  • the detection signal is used to notify the receiving subscriber the assignment of the radio link.
  • a station only transmits a useful message at the permissible transmission time if no detection signal was received by the other station.
  • the time interval from a transmission time in the time frame, which is assigned to a subscriber to send a payload to the following transmission time in the time frame, which is assigned to the transmission of a payload to each other subscriber is determined by the duration of the detection signal on the radio link between the two participants , By using the detection signal, a more performant information transmission can be achieved with a single-channel radio link than with the hitherto known half-duplex method. This embodiment allows particularly short reaction times.
  • the transmission times predetermined for the one user are time-synchronized for transmitting a useful telegram with respect to the transmission times that are predetermined for the respective other user for transmitting a useful telegram.
  • a further advantageous embodiment of the invention is provided if, according to claim 3, the transmission times for transmitting a payload telegram to the two subscribers are each predetermined by a time ruler with a time frame which is determined by the time interval.
  • the detection signal is at least partially bit-coded.
  • FIG. 1 shows a radio channel F between two subscribers A and B.
  • the radio channel F can be used only one after the other in one direction and then in the other direction to avoid collisions in the communication.
  • the radio channel F is used for the vehicle diagnosis.
  • the subscriber A is therefore connected to an evaluation unit C and the subscriber B, for example, connected via a diagnostic connector to a vehicle.
  • the subscriber B picks up the vehicle data and transmits them via the radio channel F to the subscriber A, who forwards them to the evaluation unit C for evaluation.
  • the subscriber B can receive a specification for changing a setting on the vehicle via the radio channel F.
  • the case applicable communication method according to the invention allows both participants A and B can send equal pay telegrams to the other participants B or A without long reaction times.
  • both subscribers A and B are each given transmission times in a time frame to which a subscriber A or B may send a payload to the other subscriber B or A. These transmission times are starting times for the transmission of the payload telegrams.
  • the communication method according to the invention ensures that at the respective transmission time of the subscriber A or B of the radio channel F is not currently occupied by the other participant B or A.
  • the information about the assignment is based on a detection signal, which is embedded at the beginning of the useful telegram or prefixed to the user telegram.
  • a subscriber A or B may send a payload telegram at a transmission time assigned to him if no detection signal was received at that time by the respective other subscriber B or A, which means at the same time that the radio channel F is currently not busy and free for sending a payload telegram is.
  • the duration of the detection signal via the radio channel F from one to the other subscriber essentially determines the time interval t from a transmission time Z in the time frame, which is assigned to a user telegram A or B, for the following transmission time Z in the time frame.
  • This time grid with the time intervals t is according to a time ruler according to FIG. 2 shown.
  • the detection signal is advantageously at least partially bit-coded and allows the fast detection of the busy state.
  • the transmission times (Z) for the transmission of a useful telegram specified by one subscriber (A or B) are time-synchronized with respect to the transmission times (Z) which are predetermined for each other subscriber (B or A) for transmitting a payload telegram.
  • FIG. 2 achieved, with one participant (A or B) dictates the time ruler and the other participant (B or A) adapts its time ruler of the default.
  • the participant who prescribes the time ruler only has a master function in this regard. Otherwise, both participants have equal rights in the communication procedure described above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Time-Division Multiplex Systems (AREA)
EP08011715A 2008-06-27 2008-06-27 Verfahren zur Kommunikation über einen Halb-Duplex-Funkkanal in einem Funknetzwerk Active EP2139291B1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
ES08011715T ES2371119T3 (es) 2008-06-27 2008-06-27 Método de comunicación mediante un canal de radio semi-dúplex en una red de radio.
EP08011715A EP2139291B1 (de) 2008-06-27 2008-06-27 Verfahren zur Kommunikation über einen Halb-Duplex-Funkkanal in einem Funknetzwerk
AT08011715T ATE519351T1 (de) 2008-06-27 2008-06-27 Verfahren zur kommunikation über einen halb- duplex-funkkanal in einem funknetzwerk
US13/001,464 US20110211498A1 (en) 2008-06-27 2009-06-25 Method For Communication Via A Half-Duplex Radio Channel In A Radio Network
PCT/EP2009/057936 WO2009156460A1 (de) 2008-06-27 2009-06-25 Verfahren zur kommunikation über einen halb-duplex-funkkanal in einem funknetzwerk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08011715A EP2139291B1 (de) 2008-06-27 2008-06-27 Verfahren zur Kommunikation über einen Halb-Duplex-Funkkanal in einem Funknetzwerk

Publications (2)

Publication Number Publication Date
EP2139291A1 EP2139291A1 (de) 2009-12-30
EP2139291B1 true EP2139291B1 (de) 2011-08-03

Family

ID=40193936

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08011715A Active EP2139291B1 (de) 2008-06-27 2008-06-27 Verfahren zur Kommunikation über einen Halb-Duplex-Funkkanal in einem Funknetzwerk

Country Status (5)

Country Link
US (1) US20110211498A1 (es)
EP (1) EP2139291B1 (es)
AT (1) ATE519351T1 (es)
ES (1) ES2371119T3 (es)
WO (1) WO2009156460A1 (es)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6016311A (en) * 1997-11-19 2000-01-18 Ensemble Communications, Inc. Adaptive time division duplexing method and apparatus for dynamic bandwidth allocation within a wireless communication system
US7197022B2 (en) * 2000-11-15 2007-03-27 Wi-Lan, Inc. Framing for an adaptive modulation communication system
US7415508B2 (en) * 2001-08-31 2008-08-19 Temic Automotive Of North America, Inc. Linked vehicle active networks

Also Published As

Publication number Publication date
WO2009156460A1 (de) 2009-12-30
ES2371119T3 (es) 2011-12-27
ATE519351T1 (de) 2011-08-15
EP2139291A1 (de) 2009-12-30
US20110211498A1 (en) 2011-09-01

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